Electric control for delivery of power.



:VERY 0E POWER. HENE\VED.\1AH.31,1915.

C. R. PRATT. ELECTRIC commu FOR DEL APPLICATION FILED MAR.16.'1910.

Paened Nov. 2, 19h?.

0F POWER.

D MAR. 3l, |915.

Pzen'id Nov. 2, 1915.

4 SHEETS SHEET 3 e d, w w M., Q, m M u. .f M

R. PRATT.

ELECTRIC CGNTROL FOR DELiVER( 0F POWER.

APPLICATION FILED MAR. 16, i910. RENEWED MR. SY. i915.

4 SHEETS-SHEET 4..

AIR, NEVI JERSEY, SSEGNOE TO KVEELS ANY,

CONTRGL FOR DEL-EVERY UF .L'DO'WER.

i @www Speccation of .Letters Patenten Noe.

tien :led March 18, 1.910. Serial lilo. flel. Renewed March 31, w15. Serial No. 18,412.

ifioa'n thati ARLES P. en the United dt tes, residingat in the eounty'oi Essex and State have invented certain lin- D i l for Delivery a'hien the following is a speoi iiea'tion.

This invention relates to the delivery of power, sach as 'from a generi torlilie an eninotor, or freintransmitting nieans employed to Tary the speed and direction of rotation, known as variable power 'transmission, a iuid gear.

bjeets oi l suoli '.elir

ie invention are to secure ery or power through the rotation delivery nienibe at desired speed,even under varying loads or other conditions; to do Lhis lr keeping the rotating member in synchronisni with a rotating pilot nieinher under no load and whose speed can be exactly controlled; to control said pilot nieinber, and thus the delivery of power, by eleetrio means which shall be practical and eiiieient; to employ for this purpose i pair of "'rie pilot motors; to provide ineens for *he speeds of motors, and for Ain oppositely at the saine time; to Ay ,graduated steps of variation; e transmit the motion of the said pilot motors to two elements engaging an inter f dineren'lial element, and thus control-ring the speed thereof; to thus secure a pilot speed; to transmit said pilot speed to oE a second 'pair or" elements engaging an interfiediate differential element, the other engag if; element being Connected to the fly i neel of the engine or motor ineinber of the :Qn-id and the intermediate member eeing,- adapte to transmit motion to the throttle of the engine or swinging member of the ilnid gear; to thus secure an electric 'and toniatie control o the delivery o1? `atedliy said power delrfer7 'tseli inde- 'ident of load, leakage or 'the li ze., to nd results' es may figures, Figure 1 is a horizontal. section upon line 1 1 of Fig. 3, of 'the gearing of my iniproved control; Fig. 2 is a diagrammatic plan of the pilot motors and theirV Connections to the rheostat; Fig. 3 is ,a side View of the gearing shown in Fig. l-fivith the side Wall of the casing eut away, as on line 2-2 of Fig. l; Fig. 4 is a plan View of my iinprovedcontrol applied to4 a iuid gear inserted between a gas engine and the driving pulley, and Fig. 5 is a partial side elevation of the saine.

ln said drawings, indicates a suitable .and will describe it in such application, although it should be understood that the oon-- trol een be used in many other Ways.

it its end, within the easing` 10, see Fig. 1, the `shaft 1l has a worin 12 which ine-shes into the periphery 13 ofv a worin Wheel 1d, said Worm Wheel being loose upon shaft 9 lshown as journaled transversely of the oasing 10. Upon one side of said Worm Wheel 14 are bevel .gear'teeth l5, and opposite said gear teeth 15 are other bevel gear teeth 16 yupon the side of gear Wheel 17 also inounted loose upon the said Shaft 9. Between the two Wheels lei and 17 is a spider 18 keyed to the shaft 9, and having at its periphery upon radial pivots 19 a series or iioating dil'ierential gears 2O which inesh with the gear teeth l5 and 16 described. rlhe shaft 9 is connected at its outer broken end 21 in any suitable inannerwith the control member of the power delivering means, as for example the throttle oi" a steam engine, the rheostet arm or lever of a motor, or t Le carrier for the si-ilinging cylinder of a fiuid gear. in the 7Sorter fluid gear euere referred to, eonneol 'ti-on Weins he mede roni shaft 2l @it er to ESO cross arm 71 or to hand wheel G91 ot said lPorter patent', and in Figs. i and 1 have,

shown connection to a hand lever 75 which replaces said cross arm. i

lilith the construction above described, it will'be understood that the irower delivery is under positive and sensitive control by means ot` the gear wheel 17`described 1f said gear 17 is rotated clockwise as viewed in Fig. the shaft. 11 standing still, obviously the floating gears 2() will also be. rolled around in clockwise direction and the sha't't tl correspondingly rotated. The rotation of this shaft il may be employed in any manner common to mechanics to turn the cylinder carrier ot' the pump member of the iiuid gear, such turningbeing in proper direction to start the delivery et power from the fiuid gear. 1n Figs l and t'or example, the shaft 9 is shown provided at'its outer end with a small gear TG meshing into a large gear T7 upon a suitable shaft having hearings 7S. 7S. and having also tast upon itseltl an arin 79 adapted to stand parallel with the hand leverl 75 of the swinging carrier of the pump member 90 of the fluid gear, said arm being connected to said lever by a link Sl. s the hand lever'75 is swung, power will be transmitted from the pump member to the motor member 8'2 and delivered therefrom through the shaft S3 thereo'll having the driving pulley S4. rThis delivery will Vrotate the shaft 11, referring now again to Fig. 1, in such a way as to etliect rotation et the worm wheel 14 in a direction opposite to that of the gear wheel 17, or against the hands ot a clock as viewed in Fig. il. Obviously such rotation of the worin wheel 14, which has been serving as a Yluleruin for the floating gears 20,.will retard the revolution ot the. spider frame 18 carrying said floating gears and hence the rotation ot' the shaft 9 and swinging of the cylinder carrier.- When the cylinder carrier isswung to such a point that. the worm wheel 'll rotates at the same speed as the gear wheel 17, there will be Vno rotation of the shaft l, and consequently no swinging of theI cylinder carrier in either direction. It" the cylinder carrier were swung too far, or by variation in the load or work being done the motor member ot the fiuid gear should speed up, so that the worm wheel 14 rotated faster than the gear wheel 17, the spider 1S would obviously be turned in the opposite direction o' against the hands of a clock, and with it the shaft 9, thus swinging the cylinder carrier back to lessen the speed. Obviously the device therefore automatically holds the cylinder carrier at just` that point where the' delivery speed ot the fluid gear turns the worm Wheel let in synchronism with the gear wheel 17, and hence sait gear Wheel 17 1s a pilot wheel controlling the fluid gear.. It will be 110666151.

. Contact blocks 51, 52,

that this control is absolutely independent ot l aliage in the fluid gear or variations in the load from any reason whatever.

For determining the speed of the pilot wheel 1T, l employ two pilot motors 30, 31, adapted to rotate their armature shafts 32 and 38 in'oppesite directions. These armature shat'ts have worms. as 35, respectively engaging worlnwheels 36,' 37 mounted loosely on a transverse shaft 38 of the caS-.`

ing 10. Said worm wheels 36, 37 are'at their adjacent sides connected to fulcrum .gears 4l), l1, between which is a gear 39 on the shatt ?)8 provided inside its rim with floating gears l2 mounted upon radial pivots 43 and engaging at their opposite peripheral edges said gears 40. l1. The gear 39' meshes atits peripheryy with the pilot gear 17, or is otherwise connected thereto. A

Obviously` it the pilot motors 30, 31 are rotated at the same speed in oppositey directions. there will be no rotation of the gear 239. and consequently no speed imparted to the pilot wheel 17. If, however, the speeds ot' the two worm wheels 36, 37, and consequently two gears 40. 11, vary, the carrier gear Z39 will he rotated according to the amount of such variation, thus rotating the pilot wheel 17 accordingly. I therefore provide means for controlling the two pilot motors 80.31 with respect to each other, as will next be described. This control of the pilot motors 30, 31 is secured by varying the resistances ot their field circuits by meansof rheostats. In Fig. 2, .31, *2, etc., are the contact blocks of a series ot' steps 0i the resistance ot' a rheostat, said steps dividing the whole; resistance ot the rheostat into as blocks 51. 52, etc.. and this contact strip is a wire 5G to the generator or connected by 7 i brush 5 other source of electric energy.

resting both upon the strip and opposite etc., is carried by an arm 58 of a. hand wheel 59, so that the rheostat can-be operated by said hand wheel in the following manner. As the wheel 59 is turned, for instance to swing the arm 58.

from its central position to the left as viewed in Fig. 2, a smaller portion of the current will pass through wire 53 to pilot motor 30 and a larger amount through wire 54 to pilot motor 31. This varies the fields of said motors, giving them'diti'erentlspeeds and according as the arm 5S is swung more or less, the dierence in speeds of the two pilot motors is greater or less. .Consequently, the gear 39 rotates faster or slower, and thus the pilot wheel 17 can be given a desired speed.

1t will be observed that the swinging ot' the single, arm 58 varies-the lielos of both motors, equally and simultaneously. ,Inh

otli'er'words, the fields of two motors are. varied simultaneously by means of the Asame rlieostat', resistance and contacts.

#Opposite the rlieostat 50 described, is a second 'si "fs of :fonte-st bloclrs, 61, 62, etfc., vsab-divid ng' the entire resistance of a rlieo- 60 into as inany divisions as desired, the Whole rf 'istat of lie rheostat 60 being equal to that of av single step of the lirstmentioned 'rlieostat 50. The end Contact blocks of' the said second series of steps are connected by .Wires 63, 64 to the other termi 1s of tlic fields oi' the pilot motors "from: ose which the rlieostat 50 is connected, and contact strip 65 is connected by a Wire G6 to tiie second terminal of the electric generator. i brnsli 67 is carried by 'an arm 68, pivoted upon the same center 70 with the arm 58, and adapted to be turned by a Wheel 69 concentric with Wheels 59. Thus, after the brush 57 of tlie main rlieostat 50 has been brought to the position which most nearly gives the pilot speed desired, finer adjustment is had by mean'sof thearm 68 of the. auxiliar7 rlieostat 60, which enables .each step of the main resistance to be divide-d into parts. lt will be noted thattlie two rl1eo stats are connected Wit i d series. llVires Zi and 72 denote tbe-armature circuit, being branched ior eacli pilotmotor, as necessary. A shafts 32, 33 of the two pilot motors are sup- 35 ported and jonrnaled in posts 73, 7d, `one of said posts, as 74, providing also a bearing for tlie end of ,the shaft l1. ,A

Gbvieusly, instead of varying the fields of the pilot motors, as described, tlieir varmature circuits could be varied by thesame means and in substantially the same Other cli-an es involving only mechanical skill and knowledge of the prior state oi. tlie art, and associated arts, could be made Without ng `from tlae spirit and scope oi my ,ce nderstood that in Fig, e, Soinengine and 8S the ily Wheel .onnieted direct to the pump memlie vfluid gear.

claim the, pilot motors in The ends of tlie armatore' tlins described the invention, what delivery control for power delivery e,eea means With said pilot member, tivo pilot motors, means for simultaneo-Lily and oppositely varying the speeds oir' said pil 1 motors, and means for transmitting to pilot member from said pilot motors a speed proportional to the algebraic sum oi tlie speeds of the said motors.

3. A delivery control for power delivery means, comprising a pilot Wheel, means for.

connecting and synchronizing 'the delivery member oi said power delivering means with said pilot `aflieel, tivo pilot motors, means for transmitting to said pilot member from said pilot motors a speed proportional to the algebraic snm of the speeds of said motors, and means for simultaneously varying said pilot motors.

el. A delivery control for power delivery means, comprisingl a pilot member, means for connecting and synclironizimGN tile delivery" member of said power delivering means with said pilot member, a driving Wheel for driving said pilot member, a floating gear on said driving wheel, engaging members one at each side of said loating gear, and independent means for driving each oi' said engaging members.

A delivery control 1lor power delivery means, comprising a pilot member, means for connecting and synchronizing` tlie delivery inembeiy of said povzer delivering means with said pilot member, a driving Wheel for driving said pilot members, a floating gear on said driving Wheel, engaging members one at e'acli side oil said-floating gear, independent means for driving4 each ci said engaging members, means for simultaneously varyingl botli said driving means oppositely. f

6. A delivery control for power delivery means, comprising a pilot member, means for connecting and synchronizing oelivery member of said power delivering;` means with said pilot'member, dro. n

wheel for. driving said, pilot member, bevel gears with radial axes on said drivin. a driving bevel gears on eaeli side of said dmving Wheel in axial alinement therewith, independent means for driving each or" said drivnflieels, and means for varying,- both said driving means simultaneously.

7. A delivery control for power delivery means, comprising a pilot member, for connecting and synchronizing tlieldeH livery member or said spower delivering means with said pilot member, a driving` Wheel for driving said pilot member, a iioating `gear on said driving Wheel, engaging members one eaoli side oi said iioatir gears, motors one for' driving ea'cli oi sale. engaging members, and means for varying the motors opposi-tely and simultaneously,

8. A. delivery control for power delivery means, comprising a pilot member, means connecting synchionizing,a die a no -the other, and means for varying both said motors sinnlltaneonsly.

E). rlhe coinbiiiation wi"h a pilot wheel, of

an equalizing gear having a dill'ei'ential element and opposite engaging eleinenis, means for transmitl'ing motion from said differential element to the pilot wheel,"mot irs each adapted to clrive one ot' said engaging elements, and means for varying said motors oppositely and simultaneously.

l0. The Combination with power delivering means and a power control therefor, of floating gears each :nlapted to rotate upon its Center aml to move along a given path, a pilot wheel in engagement with said Aioating gears, a second wheel in engagement with said iloating gears and connected to the power delivering member, means for imparting revolution of saivl floating gears to the power control of the power delivering Clen vice. a driving wheel adapted to engage said pilot wheel, planetary gears mounteol on saifl side of said planetary gears, moxors one for driving each or". said ulcram gears in opgesite Clireetions one from the other. and means for controlling said motors simaltaneonsl,

11. T he combination with a power {lelivering device and a power control therefor, of floating gears each adapted to rotate upon its center and to move along a given path, a pilot` wheel in engagement with said floating gears, a second wheel in engagement with said floating gears and connected to the power delivering menih r, means for imparting revolution of said floating gears to the power control of the power tlelivery device, a driving wheel aclaptecl to engage said pilot wheel, planetary gears mounted on sairl driving wheel, fulcrnm gears one at each side of said plai'ietarj.v gears, motors one for driving each of said fulcrum gears in opposite direc tion from Ithe other, and means for varying said motors sin'iultaneously.

CHARLES ln the presence of- RUssnLL M. Evinzmr, FRANCES BLonGn'rT.

P`H ATT. 

